Abstract: A selector according to an embodiment of the present disclosure includes a first electrode; a second electrode disposed opposite to the first electrode; an ion supply layer disposed between the first electrode and the second electrode to be on the side of the first electrode and doped with a metal, wherein the doped metal diffuses toward the second electrode; a switching layer disposed between the first electrode and the second electrode to be on the side of the second electrode, wherein the doped metal diffuses from the ion supply layer into the switching layer so that metal concentration distribution inside the switching layer is changed to generate metal filaments; and a diffusion control layer inserted between the ion supply layer and the switching layer, wherein the diffusion control layer serves to adjust electrical characteristics related to the generated metal filaments as the amount of the diffusing metal is adjusted in proportion to a thickness of the diffusion control layer.

Abstract: Provided is a contents distribution management system and method for supporting a plurality of global servers that provide the contents and managing the contents by applying different policies based on the global server and service type of the contents. The inventive system comprises a plurality of global servers for supplying contents to a plurality of local servers, each global server having a large capacity contents library, and the local servers for managing the contents provided from the global servers based on global servers and service types using contents tables, and providing a contents service in response to a contents streaming service demand from a last terminal using a local contents cache.

Abstract: A display rotating apparatus capable of preventing a slip phenomenon which occurs by rotary inertia. The display rotating apparatus comprises: a motor providing a driving force for rotating a display; and a motor driving device driving to rotate and stop gradually by increasing a rising time and a falling time of a rotation command signal. the display rotating apparatus can remove the slip phenomenon generated mechanically by increasing or decreasing slowly an applying voltage and/or current applied to the motor and reduce the sway by vibration at the time of stopping the display.

Abstract: The present invention is to provide a motor having a swivel hinge preventing the damage of the deceleration gear and the rotor of the motor, and the rotation apparatus of a display having the same. In one aspect, the invention features a rotation apparatus of a display, which comprises a stand, a swivel hinge having one end fixed to the stand and configured to rotate relatively when a predetermined amount of torque is applied, a motor joined to the other end of the swivel hinge by a shaft and having a deceleration gear, and a guide configured to rotates as a single body with the motor and joined to a display, wherein the restrictive torque of the swivel hinge is smaller than the constraint force of the deceleration gear and greater than the weigh of the display.

Abstract: A method and apparatus for providing a peer-to-peer (P2P) based streaming service are provided. The method provides a streaming service in a peer-to-peer (P2P) network comprising a plurality of peers. That is, a receiving peer requests a plurality of transmitting peers having contents for a streaming service among peers in the P2P network to transmit the contents. Then, the receiving peer receives identical portions of the same content from the plurality of transmitting peers at the same time. After receiving, the receiving peer provides a streaming service for the received content from a first transmitting peer among the plurality of transmitting peers to a user.

Abstract: A light quantity adjustment apparatus is disclosed. A light quantity adjustment apparatus, comprising a rotation part having an aperture for adjusting the quantity of light from a light source, a support part rotatably supporting the rotation part, a driving part rotating the rotation part left and right in a predetermined angle, a reset part for setting a base position, and a position detection part detecting the position of the rotation part, not only improves contrast ratio but also allows a clearer picture quality by adjusting the quantity of light projected from an image projection device.

Abstract: Provided is a contents distribution management system and method for supporting a plurality of global servers that provide the contents and managing the contents by applying different policies based on the global server and service type of the contents. The inventive system comprises a plurality of global servers for supplying contents to a plurality of local servers, each global server having a large capacity contents library, and the local servers for managing the contents provided from the global servers based on global servers and service types using contents tables, and providing a contents service in response to a contents streaming service demand from a last terminal using a local contents cache.